Insulator for telegraph and telephone wires.



l A. c. SORENSEN.

INSULATOR FOR TELEGRAPH AND TELEPHONE WIRS.

APPLICATION FILED FEB. 9| 19H- 1,236,886 Patentedfxug. 14,1917.

gnou/Hoz Hmm C. oaamsm '5M Mang@ ARVID C. SORENSEN, OF WEBSTER, NORTH DAKOTA.

INSULATOR FOR TELEGRAPH AND TELEPHONE WIRES.

Specification of Letters Patent.

Patented Aug. 14. 1917.

Application filed February 9, 1917. Serial No. 147,645.

To all whom t may concern Be it known that I, ARvID C. SoRENsEN, a citizen of the United States, residing at lVebster, in the county of Ramsey, State of North Dakota, have invented a new and useful Insulator for Telegraph and Telephone Wires; andI do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

p The present invention relates to an insulator for telegraph and telephone wires, and has for its object to provide a device of this character which embodies novel features of construction wherebythe line wires are permitted to have a. certain amount of play, thereby preventing breakage of the wires in extremely cold weather, and enabling a compensating device such as that shown by my prior Patent No. 1,205,281 tobe employed to the best advantage.

Further objects of the'invention are to provide an insulator of this kind which is comparatively simple and inexpensive in its construction, which will hold the line wire securely in position and at the same time permit a certain amount of longitudinal play thereon, which can be easily repaired, and which can be readily substituted for the ordinary insulators.

lith these and other objects in view, the invention consists in certainnovel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which:-

Figure 1 is a side elevation of an insulator constructed in accordance with the invention.

Fig. 2 is an end view thereof.

Fig. 3 is a vertical longitudinal sectional view through a slightly modified form of the insulator.

Fig. 4 is a transverse sectional view on the line 4 4 of Fig. 3.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Specifically describing the present em bodiment of the invention, the numeral 1 designates a stock which is shown as having a forked construction, said stock including spaced vertical side plates and a base which is secured by a bolt 2 to a support 3. A-pair of transverse pivot bolts 4 connect the upper ends of the side walls of the forked stock and have curved insulating rollers 5 mounted thereon. These rollers 5 may be inexpensively formed of glass or porcelain and are provided at their periphery with a plurality of annular grooves of a proper size for engagement with the line wire 6. A third grooved insulating roller 7 is arranged substantially in a horizontal plane, and the lower roller 7 is offset downwardly from the horizontal plane of the upper rollers and mounted. so that the top thereof extends above the bottoms of the upper rollers, thereby deflecting the portion of the line wire 6 between the upper rollers and tending to grip the same. The line wire 6 is thus held firmly in position, although it is susceptible of a longitudinal movement, thereby preventing breakage of the wire in extremely cold weather' and enabling a compensating device such as that shown by my prior Patent No. 1,205,281 to be used to the best advantage. A guard wire 9 has the ends thereof coiled upon or otherwise secured to the line wire 6, as indicated at 10, on opposite sides of the insulator, said guard wire extending loosely around the insulator and merely serving to prevent the line wire from dropping upon the ground in the event of the breakage thereof.

A slight modification is shown by Figs. 3 and 4, in which the pivot bolt 8 of the intermediate roller 7 is loosely received within vertical slots 11 in the sides of the stock and engaged by notches 12 in the arms of, a, yieldably mounted forked frame 13. In this instance the bolt 2 employed for securing the insulator to the support is formed with an extension 2a which passes through the base of the forked frame 13, the latter being held in position thereon by'a nut 14. A coil spring 15 surrounds the extension 2a of the bolt and engages the base of the forked frame 13, normally tending to move the same upwardly, thereby enabling the rollers to operate in a more effective manner in gripping the line wire and taking up slack therein.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is

l. An insulator for telegraph and telephone wires, including a stock formed with spaced vertical side walls, a pair' of transverse grooved insulating rollers journaled between the side walls of the stock and a1'- ranged in a horizontal plate, and a third grooved insulating roller arranged in an intermediate position between the pair of insulating rollers aud offset horizontally therefrom so as to deflect and tend to grip a line wire threaded between the rollers.

2. An insulator for telegraph and telephone wires, including a stock formed with spaced vertical side walls, a pair of transversely extending grooved insulating rollers journaled between the side walls of the stoel; and arranged in a horizontal plane, a third grooved insulating roller arranged at an intermediate point between the pair of grooved rollers and offset horizontally therefrom, a line wire threaded between the rollers and having the portion thereof between the pair of rollers deflected by the intermediate roller, and a guard wire eX- tending loosely around the insulator and having the ends thereof secured to the line wire en opposite sides of the insulator.

3. An insulator for telephone and telegraph wires, including a stock formed with spaced vertical side walls, a pair of transversely extending grooved insulating rollers journaled between the side walls of the stock and arranged in a horizontal plane, a third grooved insulating roller arranged at an intermediate point between the pair of rollers and offset horizontally so as to delect and tend to grip a line wire threaded between the rollers, and a yieldable mounting for the intermediate roller.

4. An insulator for telegraph and telephone wires, including a stock formed with spaced vertical side walls, a pair of transversely extending grooved insulating rollers journaled between the side walls of the stock and arranged in a horizontal plane, a third grooved insulating roller arranged at an intermediate point between the pair of grooved rollers and offset horizontally therefrom so as to deflect and tend to grip a wire threaded between the rollers, a slidably mounted fork carrying the third roller, and yielding means acting upon the slide to hold the third roller yieldably in operative position.

5. An insulator' for telegraph and telephone wires, including a stock formed with spaced vertical side walls having vertical slots therein, a fastening bolt at the base of the stock for securing the Stock in position, said bolt being formed with an extension, a, pair of transversely extending grooved insulating rollers journaled between the side walls of the stock and arranged in a horizontal plane, a fork slidable within the stock and having the base thereof engaged by the extension of the before mentioned bolt, a spring engaging the fork and normally tending to move the same upwardly, a pivot bolt extending across the arms of the fork and slidable within the before mentioned vertical slots of the stock, and a third grooved roller mounted upon the pivot bolt and arranged in an intermediate position between the pair of grooved rollers, the third roller being adapted to deflect and tend to grip the portion of a line wire between the rollers.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARVID C. SORENSEN.

itnesses H. C. SEE, ANTON SAASTAD.

Copies of this patent may be obtained for ve cents each,.by addressing the Commissioner ofv Patents,

Washington, D. C. v 

